Replace Color in Image
Pick any colour in an image and swap it for another, or make it transparent, with a tolerance slider, then download a lossless PNG.
Drag & drop an image here, or click to browse
No uploads. Your files stay on your device.
Tap the colour you want to replace.
Picked: #ffffff
How it works
Drop in a PNG, JPG or WebP, click the colour you want gone on the preview (or type its hex code), and every matching pixel is repainted with your replacement colour — or knocked out to full transparency. The whole thing runs on the Canvas API inside your own browser: the image is decoded, scanned pixel by pixel and re-drawn locally, so nothing is ever uploaded to a server.
The tolerance slider decides how close a pixel has to be to the target colour to count as a match. At 0% only exactly identical pixels change, which is perfect for flat logos and screenshots. Photos and anti-aliased edges need some headroom — try 10–25% and nudge it up until the fringe disappears, but stop before other parts of the picture start changing. The result is always exported as a lossless PNG so transparency survives.
Frequently asked questions
How do I replace a colour in an image for free?
Drop your image in, then click the colour you want to change directly on the preview (or type its hex code). Choose a replacement colour, nudge the tolerance until the whole area is covered, and hit Download PNG. It is free, needs no account, and the image never leaves your device, because every pixel is processed by the Canvas API in your own browser.
Why do the edges keep a fringe of the old colour?
Anti-aliased edges are made of dozens of in-between shades, not the one colour you picked, so at 0% tolerance only the exact pixels change. Raise the tolerance slider (10% to 25% usually swallows the fringe on a logo or screenshot) and stop as soon as unrelated parts of the picture start changing too.
Can I make a colour transparent instead of replacing it?
Yes. Tick "Make it transparent instead" and every matching pixel has its alpha set to zero; the checkerboard behind the preview shows you exactly what has been knocked out. The export is always a lossless PNG, so the transparency is preserved, which a JPEG could not do.